Normally follows after a sequence of going to sleep at increasingly later times, until your going to sleep around dinner. The only cure is to hack it through the day and go to sleep at a sensible time.

The feeling one gets after pulling an all-nighter. You start to feel so tired that you aren't even tired anymore. You eventually start to feel like you are in a dream. Sometimes when under the influence of an all-dayer people might start talking to complete strangers and be completely unaware of what is going on around them. You might also feel a strange sense of happiness and confidence.

V. The opposite of an all-nighter. An all-dayer occurs when a person has odd sleeping patterns. These habits result in a person going to bed anytime during the day. An all-dayer is the act of staying awake during the day instead of going to sleep. This act is usually performed in order to maintain a regular sleep schedule.

Mike: I'm going to sleep.

Jacob: Dude, WTF it's two in the afternoon.

Mike: I know. It's just that after that all-nighter I pulled for the calculus exam my sleep schedule has been off.

Jacob: Well, i've got tickets to the basketball game at five, and I thought you were going to go with me.

Mike: Oh snap, I totally forgot about that. I'll just pull an all-dayer so that I can go to the game.